merge method

Implementation

DecoratedContainerStyle merge(DecoratedContainerStyle? other) {
  if (other == null) return this;
  return DecoratedContainerStyle(
    contentStyle: other.contentStyle,
    titleStyle: other.titleStyle,
    padding: other.padding,
    margin: other.margin,
    background: other.background,
    border: other.border,
    borderRadius: other.borderRadius,
    gradient: other.gradient,
  );
}